1N4742A-TAP

Overview

The Vishay 1N4742A-TAP is a silicon planar power Zener diode in the DO-41 (DO-204AL) axial leaded package. It provides a nominal Zener voltage of 12 V with a standard tolerance of ±5%. The device operates at a test current of 21 mA and features a maximum dynamic resistance of 9 Ω. It supports a peak power dissipation of 1300 mW under short-pulse conditions and maintains a junction temperature rating up to 175 °C.

Feature Summary

• Designed for high-power stabilization and clipping applications
• Features very sharp reverse characteristic and low reverse leakage current
• Ensures very high stability across operating ranges

Applications

• Voltage stabilization circuits
• High power rating clipping circuits

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as the -TAP designation indicates an ammoback configuration. Confirm compliance requirements against the manufacturer's material categorization documentation. Ensure the procurement channel sources directly from authorized distributors to guarantee component authenticity and traceability.

Selection Notes

Select this component when a 12 V reference point is required within a through-hole design. The DO-41 package accommodates higher power dissipation compared to smaller surface-mount alternatives. Verify that the circuit's thermal environment allows for adequate heat sinking or airflow to maintain safe junction temperatures during operation.

Part Context

This part belongs to the Vishay 1N4728A to 1N4761A series of silicon planar power Zener diodes. The series covers a broad range of nominal voltages from 3.3 V to 75 V. All devices in this family share identical physical dimensions and electrical testing methodologies defined in document number 85816.

Replacement Considerations

Cross-reference other manufacturers' 1N4742A specifications to ensure equivalent voltage tolerance and power ratings. Verify that any substitute component utilizes the same DO-41 package footprint and pinout configuration.